Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (3): 64 doi: 10.1007/s41365-016-0074-x

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Degradation kinetics of 2,4-dichlorophenol by gamma ray irradiation in the presence of ozone

Ya-Nan Yin 1 Jun Hu 1  Jian-Long Wang 1,2   

  1. 1 Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, China
    2 Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing 100084, China
  • Contact: Jian-Long Wang E-mail:wangjl@tsinghua.edu.cn
  • Supported by:

    This work is supported by the National Natural Science Foundation of China (No. 51338005), the Program for Changjiang Scholars and Innovative Research Team in University (IRT-13026), the National High Technology Research and Development Program (No. 2009AA063905) and the International S&T Cooperation Program (ISTCP) of China (No. 2009DFB90600).

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Ya-Nan Yin, Jun Hu, Jian-Long Wang. Degradation kinetics of 2,4-dichlorophenol by gamma ray irradiation in the presence of ozone.Nuclear Science and Techniques, 2016, 27(3): 64     doi: 10.1007/s41365-016-0074-x
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Abstract:

Gamma ray-induced degradation of 2,4-dichlorophenol (DCP) in the presence of ozone has been investigated. The results show that ozone can remarkably increase the degradation rate of 2,4-DCP in aqueous solution. The degradation kinetics of 2,4-DCP can be described by the first-order reaction model, and the rate constant was 0.443, 0.490 and 1.247 h−1, respectively, for γ-ray irradiation only, γ-ray irradiation + 13 mg/L O3 and γ-ray irradiation + 30 mg/L O3. High-performance liquid chromatography analysis shows that the dechlorinated products are 4-chlorophenol, 2-chlorophenol and phenol; and the oxidation products are hydroquinone, benzoquinone, maleic, fumaric, acrylic, malonic, oxalic, acetic and formic acids. The possible pathways for 2,4-DCP degradation involving all these oxidation products are tentatively proposed. Combining γ-ray irradiation with ozonation is a promising technology for removing toxic pollutants from water and wastewater.